Bug 208909

Summary:	amdgpu Ryzen 7 4700U NULL pointer dereference multi monitor with rotation
Product:	Drivers	Reporter:	kernel
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	RESOLVED CODE_FIX
Severity:	normal	CC:	alexdeucher
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	5.8.0-050800-generic	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	dmesg output complete dmesg output xorg log another backtrace 5.8.2 backtrace 5.8.3 backtrace 5.8.9 backtrace

Description kernel 2020-08-15 07:07:08 UTC

Created attachment 290909 [details]
dmesg output

Hi,

I have a lenovo E15 gen2 laptop running, with a Ryzen 7 4700U renoir Vega 7, on a 5.8 ubuntu mainline kernel including the latest firmware files (git).

System seems stable so far when running 2 monitors (internal display, and external display on DP).

When adding a third monitor on the HDMI output and rotating this monitor, the system crashes with a null pointer dereference.


any help would be appreciated

cheers

Comment 1 Alex Deucher 2020-08-17 17:55:41 UTC

Please attach your full dmesg output and xorg log (if using X).

Comment 2 kernel 2020-08-18 06:48:50 UTC

Created attachment 292003 [details]
complete dmesg output

Comment 3 kernel 2020-08-18 06:49:02 UTC

Created attachment 292005 [details]
xorg log

Comment 4 kernel 2020-08-18 06:49:18 UTC

Created attachment 292007 [details]
another backtrace

Comment 5 kernel 2020-08-18 06:54:49 UTC

Hi,

I have justed tested today the rotation on the HDMI output with one external monitor only, the same result, it seems that there is a rotation problem in general.

If you need any further information or testing, do not hesitate to ask ;)

cheers

Comment 6 Alex Deucher 2020-08-18 13:34:36 UTC

What resolutions are your displays?

Comment 7 kernel 2020-08-18 13:35:36 UTC

FullHD

Comment 8 kernel 2020-08-21 05:57:53 UTC

just tried the 5.8.2 kernel same result, backtrace is attached

Comment 9 kernel 2020-08-21 05:58:20 UTC

Created attachment 292043 [details]
5.8.2 backtrace

Comment 10 kernel 2020-08-23 09:51:57 UTC

just tried the 5.8.3 kernel with the same result, backtrace is attached.

This time I tried to rotate the display on the DisplayPort/USB-C, it does not seem to be related to the port.

Comment 11 kernel 2020-08-23 09:52:16 UTC

Created attachment 292063 [details]
5.8.3 backtrace

Comment 12 kernel 2020-09-13 11:14:34 UTC

Created attachment 292495 [details]
5.8.9 backtrace

Still crashing with 5.8.9

Comment 13 kernel 2021-08-25 05:19:02 UTC

I have currently upgraded to 5.11.0-27-generic (hwe) and this problem seems to be fixed.